source_estimate.py 文件源码

def _read_3(fid):
    """ Read 3 byte integer from file
    """
    data = np.fromfile(fid, dtype=np.uint8, count=3).astype(np.int32)

    out = np.left_shift(data[0], 16) + np.left_shift(data[1], 8) + data[2]

    return out